pgsql: Rename jsonpath method arg tokens

Rename jsonpath method arg tokens

This is just cleanup in the jsonpath grammar.

Rename the `csv_` tokens to `int_`, because they represent signed or
unsigned integers, as follows:

* `csv_elem` => `int_elem`
* `csv_list` => `int_list`
* `opt_csv_list` => `opt_int_list`

Rename the `datetime_precision` tokens to `uint_arg`, as they represent
unsigned integers and will be useful for other methods in the future, as
follows:

* `datetime_precision` => `uint_elem`
* `opt_datetime_precision` => `opt_uint_arg`

Rename the `datetime_template` tokens to `str_arg`, as they represent
strings and will be useful for other methods in the future, as follows:

* `datetime_template` => `str_elem`
* `opt_datetime_template` => `opt_str_arg`

Author: David E. Wheeler <david(at)justatheory(dot)com>
Reviewed-by: Andrew Dunstan <andrew(at)dunslane(dot)net>
Discussion: https://postgr.es/m/CA+v5N40sJF39m0v7h=QN86zGp0CUf9F1WKasnZy9nNVj_VhCZQ@mail.gmail.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/a35c9d524ed0a225894c45a33017a82cd8bb6680

Modified Files
--------------
src/backend/utils/adt/jsonpath_gram.y | 42 +++++++++++++++++------------------
1 file changed, 21 insertions(+), 21 deletions(-)